Siemens Siprotec 7UM611 Manual page 173

Malfunction Responses of the Monitoring Functions
Depending on the type of malfunction detected, an indication is sent, a restart of the
processor system initiated, or the device is taken out of service. After three unsuccess-
ful restart attempts, the device is also taken out of service. The operational readiness
NC contact operates to indicate the device is malfunctioning. Also, the red LED
"ERROR" lights up on the front cover, if the internal auxiliary voltage is present, and
the green "RUN" LED goes out. If the internal auxiliary voltage fails, then all LEDs are
dark. The following table summarises the monitoring functions and the malfunction re-
sponses of the device.
Table 2-7
Monitoring
Auxiliary Supply Voltage external (aux. voltage) in-
Loss ternal (converter)
Internal Supply Voltag- internal (converter) or refer-
es ence voltage
Battery Internal (battery)
Hardware Watchdog internal (processor failure) Device not in operation
Software Watchdog internal (processor failure) Restart attempt
Working Memory ROM internal (hardware)
Program Memory RAM internal (hardware)
Settings memory internal (hardware)
Sampling frequency internal (hardware)
1 A/5 A changeover Jumper for 1 A/5 A miscon-
nected
Current Sum internal (measured value
acquisition)
Current Symmetry External (power system or
current transformer)
Voltage sum internal (measured value
acquisition)
Voltage symmetry external (power system or
voltage transformer)
Voltage phase se- external (power system or
quence connection)
Current phase se- external (power system or
quence connection)
"Fuse Failure Monitor" external (voltage transform-
ers)
Trip Circuit Monitoring external (trip circuit or
control voltage)
1)
2)
7UM61 Manual
C53000-G1176-C127-3
Summary of Malfunction Responses of the Device
possible causes
Device shutdown
Device not in operation LED "ERROR"
Indication
1)
Aborted restart, Device
not in operation
during startup
during operation:
Restart attempt
Restart attempt
Device not in operation LED "ERROR"
Device not in operation
indication
Indication
Indication
Indication
Indication
Indication
Indication
Indication
Indication
After three unsuccessful restarts, the device is taken out of service.
DOK = "Device Okay" = Operational readiness relay drops off, protection and control func-
tions are blocked. Operator communication is still possible
Malfunction Re- Indication (No.)
sponse
all LEDs dark
"Error A/D-conv."
(FNo. 181)
"Fail Battery"
(FNo. 177)
LED "ERROR"
1)
LED "ERROR"
LED flashes
LED flashes
LED "ERROR"
1)
1)
LED "ERROR"
LED "ERROR"
"Error1A/5Awrong"
(FNo. 192)
"Failure Σ I"
(FNo. 162)
"Fail I balance"
(FNo. 163)
"Fail Σ U Ph-E"
(FNo. 165)
"Fail U balance"
(FNo. 167)
"Fail Ph. Seq. U"
(FNo. 176)
"Fail Ph. Seq. I"
(FNo. 175)
"VT Fuse Failure"
(FNo. 6575)
"FAIL: Trip cir."
(FNo. 6865)
2.28 Measurement Supervision
Output
2)
DOK drops out
2)
DOK drops out
2)
DOK drops out
2)
DOK drops out
2)
DOK drops out
2)
DOK drops out
2)
DOK drops out
2)
DOK drops out
DOK drops out
as allocated
as allocated
as allocated
as allocated
as allocated
as allocated
as allocated
as allocated
2)
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